Calls
One-to-one and group calls, the in-call controls, and exactly what a call reveals.
Starting a one-to-one call
Start a call from a direct chat. Once connected you have camera-flip, speaker/bluetooth output, a video toggle, mute, and end-call controls on screen.
Starting an ad-hoc group call
Open the multi-select contact picker and choose "New Call" to start an ad-hoc call with several people at once, there's no separate scheduling step.
The participant grid and pinning a participant
Group calls show every participant in a grid. Minimize the call to keep working elsewhere, or pin one participant to keep them large on screen.
Call history
Every call, one-to-one or group, is logged in the call history screen so you can see who called and when.
What a call actually reveals
One-to-one calls are peer-to-peer WebRTC, encrypted end-to-end between the two devices with DTLS-SRTP. That also means your IP address is visible to your call partner and to the TURN relay that helped connect you, this is inherent to how peer-to-peer calling works, not a bug.
Group calls route through a central SFU (a media relay for multi-party calls). The SFU terminates encryption per participant so it can forward audio and video to everyone else in the call. That means group calls are encrypted in transit to and from the SFU, but the SFU itself can see decrypted media. Group calls are not end-to-end encrypted the way one-to-one calls are. Group messages are unaffected: they stay end-to-end encrypted under per-member sender keys.
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